docs: def load_remote_system(url, format=None):
      '''Load a system from the remote location specified by *url*.
  
      **Example**
  
      ::
  
          load_remote_system('https://raw.github.com/chemlab/chemlab-testdata/master/naclwater.gro')
      '''
      filename, headers = urlretrieve(url)
      return load_system(filename, format=format)